1. D. B. Colyer, Miniature cryogenic refrigerator turbo-alternators, in: “Advances in Cryogenic Engineering, Vol. 14,” Plenum Press, New York (1969), p, 405.
2. N. Tsumaki, et al, Experimental investigation on a floating bush gas bearing, in “Proc. of JSLE Intl. Tribology Conf.,” JSLE, Tokyo (1985), p. 779.
3. S. Harada, et al, Heat transfer performance of perforated-plate heat exchanger, in: “Proc. of 31st Meeting of Cryo. Assoc. of Japan,” Cryo. Assoc. of Japan, Tokyo (1984), p. 46.
4. N. Arai, et al. Scroll and screw compressors: the latest compressor technology for air conditioning and refrigeration, Hitachi Review, 34: 6 (1985).